Improvement in coverings for melting-pots



anta sain @anni Gti-"fitr,

' ALBERT o. LEWIS, oE,4 NEW YORK, N. Y -AssLeNoE To HIMSELE, H. li.,EIoEAEDsoN, AND N. A. EoYNToN, oEsAME PLACE.

Letters Patent Ne. 113,312, dated April 4, 1871.

The Schedule referred to in these Letters Patent and makingpast of the lname.

To'all 'whom tt may-concern:

Be it known that I, ALBERT C. LEWIS, of New Yorkcity, in the county and State of N ew'York, have invented anew anduseful Improvement in Covering for Melting-Pots; and I do hereby declare `thatl the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had tothe accompanying drawing forming part of this specification.

The figure is a vertical section of a melting-pot covered with my improved covering.

My inventionhas for its object to furnish an improved covering for melting-pots, to protect them from being injured by the intense heat, and by .the adhesion` of the coals; and

` It consists in a covering of asbestus wound or braided about the melting-pot, as vhereinafter .more 'fully de-v scribed. L

A represents a j meltingpot or Crucible made of plumbago in the y,ordinary manner. used, the pot A, before being put into the fire, is covered with a coating of clay. This'elaycoatng usually cracks and partially drops ofi, so that the coals have access to and adhere to the outer surface 'of the pot,

from which they cannot be removed without injuring Y or spoiling thepot.

To prevent this I cover the pot with a covering, B, of asbestus. The asbestusiscrusbed or pounded to reduce it to a iibrous mass, leaving the fibers as long as possible. The fibrous asbestus is then twisted or As commonlyY braided into a cord or rope, which is then Wound or braided around the bottom and sides ofthe pot A, so that its outer surface may be entirely covered; or, the asbestus may be'braide'd upon the melting-pot A in the manner of basket-work.

It is entirely immaterial in what manner the asbestus is applied to the pot, provided its ent-ire outer snrfaoe be covered so that the coals cannot come in coutact vwith the surface of the pot.

AWhen the pot, thus covered, 'is to be used, it may be covered with a 'light coating of clay, which may come ofi with the. ooalsthat may adhere to it.

This asb'estus covering, being unaffected by re or heat, will effectually guard the pot from injury, no matter how intense may be the heat to which it may be exposed.

` Having thus described my invention,

I claim as new and desire to secure by Letters Patent/ An improved covering for melting-pots or crucibles, formed of'asbestus, twisted, Wound, or braided around and-.upon-said pot, so as to cover its entire outer snrface, substantially as herein shown and described, and for the purpose set forth.

TheV above specilioation of my invention signed by me this ISth'day of January', 1871.

' v ALBERT O. LEWIS.

IVitnesses:

JAMES .1. GRAHAM, Grao. W. MABEE. 

